Sound absorption analysis of castor oil based polyurethane foam with natural fiber

Yuvaraj, L.; Jeyanthi, S.; Babu, M.C. Lenin

doi:10.1016/j.matpr.2018.10.141

Cited by 15 publications

(12 citation statements)

References 11 publications

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“…Meanwhile, the sound absorption coefficients at 500 Hz with the corresponded thickness are also displayed in Figure 13B. As indicated in these two figures, the RGO/PVA porous ceramics have better NRC values under the same thickness than other sound absorption materials 14,16–20,22,60–73 . In addition, at the same thickness, the RGO/PVA porous ceramics possess an excellent sound absorption coefficient at 500 Hz, indicating this hybrid porous ceramics can be utilized in a low‐frequency range.…”

Section: Resultsmentioning

confidence: 76%

“…As indicated in these two figures, the RGO/PVA porous ceramics have better NRC values under the same thickness than other sound absorption materials. 14, [16][17][18][19][20]22,[60][61][62][63][64][65][66][67][68][69][70][71][72][73] In addition, at the same thickness, the RGO/PVA porous ceramics possess an excellent sound absorption coefficient at 500 Hz, indicating this hybrid porous ceramics can be utilized in a low-frequency range.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced sound absorption properties of porous ceramics modified by graphene oxide films

et al. 2022

J Am Ceram Soc

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Under the condition of constant thickness, improving the low-frequency sound absorption performance of conventional sound-absorbing materials is a challenging research topic. To address this issue, a new reduced graphene oxide/polyvinyl alcohol (RGO/PVA) porous composite ceramic was fabricated using freeze-drying and optimized by redesigning the internal connecting pores of porous ceramic matrixes with a reticular microstructure using RGO and PVA.The as-prepared porous structure showed significant enhancement in the lowfrequency sound absorption band compared with pristine porous ceramics. In addition, the hybrid porous ceramics exhibited low thermal conductivity. These favorable properties indicate that the hybrid sound-absorbing ceramics have potential application prospects for noise reduction in the fields of construction and electrical and mechanical devices.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Enhanced sound absorption properties of porous ceramics modified by graphene oxide films

et al. 2022

J Am Ceram Soc

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“…These biomass wastes are low‐cost and contribute to minimizing the environmental problems caused by the disposal of vegetable oil 2 . The literature has reported several studies about the reinforcement in PU with biomass wastes for synthesizing high‐performance adsorbent such as waste paper, 35 kenaf fibers, 36 lignin, 37 orange peel, 38 sugarcane bagasse, 2 cellulose fibers, 39 and wood fibers 40 . Among the natural fibers, the ARs are highlighted.…”

Section: Introductionmentioning

confidence: 99%

Eco‐friendly foams of castor oil based‐polyurethane with Artemisia residue fillers for discarded vegetable oil sorption

Maia

Zanini

Claro

et al. 2021

J of Applied Polymer Sci

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In this article, a new approach is applied to reuse Artemisia residue (AR) as filler in polyurethane (PU) foam for vegetable oil sorption for discarded cooking oil applications. The pristine PU and PU/X%AR foams (X stands for AR content of 5–20%wt/wt) were characterized by SEM, density, contact angle (CA), thermogravimetric analysis, and Fourier transform infrared spectroscopy. The influence of two experimental factors, such as contact time (30–180 s) and initial vegetable oil concentration (20–200 g/L), was investigated in vegetable oil and vegetable oil/mineral water systems. The AR loading of the foams increased the foams' density and influenced the morphological, physical, thermal, and sorption properties. The PU/20%AR sample presented the highest CA (122.5°) and the best sorption capacity and efficiency in both systems due to the small pores size and higher frequency of pores. Langmuir and Freundlich isotherm models well defined the sorption mechanisms. The Langmuir model represented the best fit of experimental data for PU/20%AR with a maximum adsorption capacity of 16.86 g/g. The PU/20%AR presented reusability of 7 cycles, conserving their hydrophobicity after the process. Therefore, AR is an innovative route as fillers in PU foams for discarded vegetable oil sorption, and the circular economy can benefit from the reuse of discarded vegetable cooking oil.

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“…However, under harsh conditions, PU alone cannot provide satisfactory thermal, mechanical and corrosion resistance performance. Acoustic properties can be improved with various functional components, particles or reinforcing fibers as they exhibit insufficient sound absorption behavior, especially in low frequency regions [5,6]. At this point, the inclusion of synthetic fibers into PU has been used for many years in the industry, but new searches have been initiated due to its disadvantages such as high cost, dependence on non-renewable resources and serious environmental problems [7].…”

Section: Introductionmentioning

confidence: 99%

The mechanical, thermal and sound absorption properties of flexible polyurethane foam composites reinforced with artichoke stem waste fibers

Olcay

Koçak

2020

Journal of Industrial Textiles

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Recently, due to environmental concerns and dependence on depleted resources, the use of renewable resources has become important in the preparation of various industrial materials. The use of natural fibers instead of petroleum-based synthetic fibers traditionally used in the production of composite materials provides many advantages in terms of both environmental and cost. The utilization of agricultural wastes as natural fibers also contributes significantly to the reduction and reuse of wastes, which is one of the objectives of sustainable development. In this study, artichoke stem waste fibers reinforced polyurethane foam composites were obtained. The fibers were treated with alkaline surface treatment at different concentrations (5% and 10%) of sodium hydroxide (NaOH) and durations (5, 10 and 15 min). The optimal alkali method was determined and applied to the fibers and its effect on composites was also investigated. Treated and untreated fibers were combined with polyurethane (PU) matrix at different reinforcement ratios (5, 10, 15 and 20%) to produce bio-fiber based composites. Depending on these reinforcement rates and alkali treatment, the mechanical properties of composites such as strength, elongation and modulus were investigated. The composites, which have the best mechanical properties, were selected and these composites were evaluated in terms of thermal and sound insulation with considering their morphological properties. It has been determined that artichoke stem waste fibers can provide good mechanical, thermal and sound insulation properties in the composites, and thus it has been found that great advantages can be achieved in terms of cost and ecology.

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Sound absorption analysis of castor oil based polyurethane foam with natural fiber

Cited by 15 publications

References 11 publications

Enhanced sound absorption properties of porous ceramics modified by graphene oxide films

Enhanced sound absorption properties of porous ceramics modified by graphene oxide films

Eco‐friendly foams of castor oil based‐polyurethane with Artemisia residue fillers for discarded vegetable oil sorption

The mechanical, thermal and sound absorption properties of flexible polyurethane foam composites reinforced with artichoke stem waste fibers

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